The seconds-hand in stop-watches



UNITED STATES PATENT OFFIOE.

ARTHUR VADSYVORTH, OF NEV YORK, N.l Y.

METHOD OF OPERATING THE SECONDS-HAND IN STOP-WATCHES.

Specification of Letters Patent No. 31,840, dated March 26, 1861.

To all whom it may concern:

Be it known that I, ARTHUR -mswoRTH, ol" New York, in the county and State of New York, have invented a new and Improved llIethod of Operating and Arranging Independent Seconds-Hands; and I do herebyv declare that the following is a tull and exact description of the same, reiterence being had to the accompanying drawings and to the letters ot' reference marked thereon.

On the spindle A of the common seconds hand, a wheel B is placed, so as to turn with said spindle. On the spindle, D, ot the hour or main hands, asimilar wheel, C, is placed turning loosel;7 on the same, and having the independent hand E attached. The wheels, I3, and, O, musthave both the same number of teeth either sixty or one hundred and twenty.

An intermediate wheel F arranged to gear into both wheels, I3, and, C, so as to communicate the power from the wheel, B, to the wheel, O, is arranged on an arbor tast to a slide, G, capable of turning loosely on said arbor. This slide, G, is operated by a lever, I, one end of which projects through the rim, I-I, of the watch casing. By means of this lever I the slide G is moved in such a manner as to bring' the wheel, F, either in gearing with both the wheels, B, and, C, or to bring said wheel F out of gear, from the wheel, O, and onl7 in connection with the wheel, B, in which latter position the movement of the independent hand E, will be stopped.

A pointed projection, O, of the lever, I, works into notches in the spring catch, J, bv which the motion of said lever, I, is deter mined. Against the teeth of the wheel, C,

a small spring, S, is made to operate, so as to produce a slight stoppage to said wheel at'ter the passage ot' each tooth, which, although very small, so as not to interrupt the regular motion of this wheel, will be, at the eXtreme point of the independent hand E, sutciently marked to indicate the seconds or half seconds.

I do not claim working the independent seconds hand from a wheel placed on the spindle of the usual seconds hand, and connected together by means of an intermediate wheel, nor do I claim placing a stop spring against the wheel of the independent seconds hand spindle; but,

lVhat I claim as my invention and desire to secure bv Letters Patent is- T he manner of operating the intermediate wheel I" b v means oit' a lever I in combination with a spring J, when arranged for the purpose substantiallyv as specified.

ARTHUR IVADSVORTH.

Vitnesses HENRY E. IoEDER, JULIAN KEEN. 

